Specifications
Chapter 2 – SocketModem (MT5600SMI & MT5656SMI)
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342C) 47
Electrical Characteristics
3.3 V Serial SocketModem
3.3 V DC Characteristics (TA = 0°C to 70°C; VDD = 3.3 V ± 0.3 V) VDDMAX = 3.6 V
Inputs
–DTR (40), –TXD (35), –RTS (33), –RESET (24)
Input High
Min 2.0 V
Input Low
Max 0.8 V
Outputs
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)
2 mA, Z INT = 120 Ω
Output High
Min 2.4 V
Output Low
Max 0.5 V
Digital Input Capacitance
50pF
3.3 V Parallel SocketModem
Electrical characteristics for Parallel SocketModem devices are presented below.
3.3 V DC Characteristics (TA = 0°C to 70°C; VDD = 3.3 V ± 0.3 V)
VDDMAX = 3.6 V
Digital Inputs
–DS (40)
Input High
Min 2.0 V
Input Low
Max 0.8 V
Digital Inputs (hysteresis input buffer)
A0 (31), A1 (25), A2 (34), –WR (32), –RD (33)
8mA Z
INT
= 50Ω 2 mA Z
INT
= 120 Ω
Input High
Min 2.0 V
Input Low
Max 0.8 V
Digital Input/Output
DO (37), D1 (38), D2 (29), D3 (39), D4 (35), D5 (36), D6
(41), D7 (27)
2 mA, Z
INT
= 120 Ω
Input High
Min 2.0 V
Output High
Min 2.4 V
Input Low
Max 0.8 V
Output Low
Max 0.5 V
Digital Output
INT (30)
2 mA, Z
INT
= 120 Ω
Output High
Min 2.4 V
Output Low
Max 0.5 V
Digital Input Capacitance
50pF
5 V Serial SocketModem
5 V DC Characteristics (TA = 0 °C to 50 °C; VDD = 5 V ± 0.25 V) VDDMAX = 5.25 V
Digital Inputs
–DTR (40), –TXD (35), –RTS (33), –RESET (24)
Input High
Min 2 V
Input Low
Max 0.8 V
Digital Outputs
–DCD (39), –CTS (38), –DSR (37), –RI (36), –RXD (34)
Output High
Min 2.4 V
Output Low
Max 0.5 V
Current Drive
15 mA
Digital Input Capacitance
5 PF
5 V Parallel SocketModem
5 V DC Characteristics (TA = 0 °C to 50 °C; VDD = 5 V ± 0.25 V) VDDMAX = 5.25 V
Digital Inputs
–DS (40)
Input High
Min 2 V
Input Low
Max 0.8 V
Digital Inputs (hysteresis input buffer)
A0 (31), A1 (25), –WR (32), –RD (33)
Input High
Min 2 V
Input Low
Max 0.8 V
Digital Input / Output
DO (37), D1 (38), D2 (29), D3 (39), D4 (35), D5 (36), D6 (41),
D7 (27)
Input High
Min 2 V
Input Low
Max 0.8 V
Current Drive
8 mA
Digital Output
INT (30)
Output High
Min 2.4 V
Output Low
Max 0.5 V
Current Drive
8 mA
Digital Input Capacitance 5 PF